Foundations of GMAT Math (Computation) || with Accurate Answers 100%.
positive x negative = correct answers negative
negative x negative = correct answers positive
2^2 correct answers 4
3^2 correct answers 9
4^2 correct answers 16
5^2 correct answers 25
6^2 correct answers 36
7^2 correct answers 49
8^2 correct answers 64
9^2 correct answers 81
10^2 correct answers 100
11^2 correct answers 121
12^2 correct answers 144
13^2 correct answers 169
14^2 correct answers 196
15^2 correct answers 225
20^2 correct answers 400
25^2 correct answers 625
prime number correct answers a number that can only be divided by itself and 1 without remainders
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97
2^3 correct answers 8 2^4 correct answers 16
2^5 correct answers 32
2^6 correct answers 64
2^7 correct answers 128
2^8 correct answers 256
2^9 correct answers 512
2^10 correct answers 1,024
3^3 correct answers 27
3^4 correct answers 81
3^5 correct answers 243
4^3 correct answers 64
4^4 correct answers 256
4^5 correct answers 1,024
5^3 correct answers 125
square root 2 correct answers 1.4
square root 3 correct answers 1.7
square root 5 correct answers 2.2
a number is divisible by 2 if... correct answers even
a number is divisible by 3 if... correct answers digits sum to a multiple of 3
a number is divisible by 4 if... correct answers last two digits are divisible by 4
a number is divisible by 5 if... correct answers ends in 5 or 0
a number is divisible by 6 if... correct answers divisible by 2 and 3
a number is divisible by 9 if... correct answers digits sum to a multiple of 9
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