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Find the missing number. 3 2 = 7, 5 4 = 23, 7 6 = 79, 10 9 = ?

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Find the missing number.
3 2 = 7,
5 4 = 23,
7 6 = 79,
10 9 = ?

posted Jun 10, 2022 by Aarati Mahajan

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Similar Puzzles
+4 votes

If

3   2 = 7
5   4 = 23
7   6 = 47
9   8 = 79

Then

10  9 = ??
0 votes

Calculate the number of ordered triples (A1, A2, A3) such that:

A1 ∪ A2 ∪ A3 = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
A1 ∩ A2 ∩ A3 = ∅

Write your answer as 2a3b5c7d where a, b, c, d are non-negative integers.

–2 votes

If the following is true, can you find the value of (4 + 9)?

7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

...