Does the converse rule apply in product Sudoku ? And in mathdoku , is it necessary that all 4 mathematical operation has to be done ?

No converse rule since there is no line that all product squares are given.

Yes, all four operations for each 3x3 box, i.e. the Sudoku will contain either 4 operation clues or none for any given 3x3 box.

Hi,
Could you please explain the steps how to solve killer sudoku, frame sudoku and mathdoku of instruction booklet?
Hints where to start from?
Thank you.

Killer Sudoku: Try to focus on thing that total sum in each row or column or box should be 45. So you can get 4 of the digits directly at r3c3,r7c7,r6c4 and r4c6 using totaling rule in box 1,9,8,2 repectively. Also focus on sums which you know the pairs like 17 - 2 digits (98) , 16 - 2 digits (97) etc even 24 - 3 digits (789) etc. Try writing possibilities of known sums like 5 can be either 3+2 or 4+1 try to elliminate one of them. I guess this should get you started .
Frame Sudoku : It follows somewhat similar concept of killer to write down combinations of each sum. Starting with easiest ones. Like 6 -> 1+2+3, 7 -> 4+2+1, 23 - 6+8+9 etc. Then see the interaction of vertical and horizontal clues. E.g. box 1 -> If you see second row first 3 digits should sum to 20 because 1-9 will add to 45 and there is already 13 and 12 in 1st and 3rd row. Now with vertical clue of 7 which can be 4+2+1, r2c3 cannot be 2 or 1 and hence it has to be 4. This leaves 9-7 pair in r2c1c2. Similar thing in box 9 --> r9c7 should be 3 (it cannot be 1 or 2). So try to think in this direction.

Thanks a lot Swaroop for the help.

Any tips for mathdoku?

Well, two things stand out for Mathdoku (considering 9x9) - anything higher than 17 has to be due to multiplication, and prime numbers >10 like 11/13/17 have to be due to addition. There are similar restrictions for subtraction and multiplication too, just narrow it down box by box.

Thank you.
Appreciate the way you people help.
Thanks once again.

Link for score page : http://logicmastersindia.com/SM/201501/score.asp

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

Well done, Prasanna!

I liked the 'LMI' in the Arrow, the symmetry of the large Frame, and the multiples of 5 theme in the large Mathdoku.

Thanks for the puzzles, cheers!

Dave

There was a theme in the Killer too, just in case people miss that. I'm glad you enjoyed the puzzles :)

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

Awesome Puzzles Prasanna. All puzzles were very nice. I liked killer and Frame very much.
I knew that Rakesh you are good in Math Variations, so had a little thought in mind that if want to lead you then need to do really fast. As i am weak in Math variations. But after test was over i felt that i did well than i thought but little i know that still you are leading :) Well done.
Thanks LMI and Prasanna for awesome test :)
Looking forward to Next Episode.

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

Very nice puzzles Prasanna!
It's been a long time since I participated in a test. The math-theme suits me always fine, so this was a good moment to join again. Unfortunately I messed up the mathdoku once and the killer twice near the end, otherwise I would have been close to completing a test.
Thanks for all the efforts; keep up the good work! :)

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Fairly Nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Many puzzles were worth too much or too little
What was your opinion of the booklet formatting and printing?	Just right

How well did the variants represent the theme of the test ?	variations represented the theme well
What was your opinion of the distribution of easy/hard puzzles?	Just right
What did you think about the puzzle quality of the test?	Very nice
Of the puzzles you solved/attempted, how well did the point values reflect the difficulty?	Most puzzles were worth the right amount
What was your opinion of the booklet formatting and printing?	Just right

Ah!That was an enjoyable sprint test.I feel completely satisfied with my performance.I would have wrapped up the test in ~60mins had it not been for the 3 broken attempts in product sudoku 1!

I kept repeating the same mistake of assuming the 12 product in Box 6 to be composed of 3,4 pair.(2,6) never occured to me until the fourth attempt during which I started from a different portion of the puzzle.Eventually,this 'little' puzzle ended up costing me 11mins.But that was just a single negligible blemish in an otherwise wonderful test.

My favourites of the lot were Mathdoku and Frame sudoku.The way in which 5 and 1 played their part in Mathdoku was fascinating.Frame sudoku turned a bit difficult and more interesting towards the end.

Thanks a lot prasanna for a delighful set of sudokus!I had great fun solving the test......