14, 10, 8
9, 16, 7
10, ?, 9
Answer is 13
How?
Actually the sum of the first two rows is 32
so the missing number should be 32-10-9=13.
Number Puzzle #18
Number Puzzle #17
Find the missing section
Answer is C
Number Puzzle #16
IF 11 = 20
12 = 31
13 = 42
14 = 53
Then 18 = ?
Answer with Explanation
Answer is 97.
How?
11 => (1+1)(1-1) => 20
12 => (2+1)(2-1) => 31
13 => (3+1)(3-1) => 42
14 => (4+1)(4-1) => 53
similarly
18 => (8+1)(8-1) => 97
Number Puzzle #15
IF 5 + 3 = 28
9 + 1 = 810
8 + 6 = 214
5 + 4 = 19
then 7 + 3 = ???
Answer with Explanation
Answer is 410.
How?
5 + 3 = (5-3)(5+3) = 28
9 + 1 = (9-1)(9+1) = 810
8 + 6 = (8-6)(8+6) = 214
similarly
7 + 3 = (7-3)(7+3) = 410
Number Puzzle #14
IF
2 + 3 = 10
8 + 4 = 96
7 + 2 = 63
6 + 5 = 66
then 9 + 3 = ?
Answer with Explanation
Answer is 108.
How?
2 + 3 = 2 *(2+3) = 10
8 + 4 = 8*(8+4) = 96
7 + 2 = 7*(7+2) = 63
6 + 5 = 6*(6+5) = 66
9 + 3 = 9*(9+3) = 108
Number Puzzle #13
IF
1 = 3
2 = 3
3 = 5
4 = 4
5 = 4
then 6 = ?
Answer with Explanation
Answer is 3.
How?
It simple, but you have to think more then the math 🙂
1 = one = 3 letters
2 = two = 3 letters
3 = three = 5 letters
4 = four = 4 letters
5 = five = 4 letters
6 = six = 3 letters
Number Puzzle #12
64 5 40
81 7 65
16 4 ?
Answer with Explanation
Answer is 16.
How?
Its a little trickier one then others.
sqr root(64) * 5 = 40
sqr root(81) * 7 = 63
sqr root(16) * 4 = ? = 16.
Number Puzzle #11
6 3 2
-3 ? 5
———-
2 6 7
Answer with Explanation
Answer is 6.
How?
It is the simple subtraction as we used to do in our early maths classes in our childhood, so just reminds us of those days of taking carry and subtracting.
Number Puzzle #10
1 2 3
2 4 6
3 6 ?
Answer with Explanation
Answer is 9.
How?
Here, every element in second row = corresponding column element in first row * 2.
Similarly every element in third row = corresponding column element in first row * 3.
Number Puzzle #9
50
20 40
90
30 10
?
Answer with Explanation
Answer is 30.
How?
Sum of the numbers on vertices of a triangle should be 90, i.e. 20 + 40 + ? = 90 => ? = 30.
