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You can't use a calculator. Test your mental math with our questions. Improve you mental math.
1
60x60
3600
88% got this right
You multiply 6 by 6 which is 36. Include two 0's from 6's which is 3600.
2
Power (^). 9^(x) = 81. Mark on number line.
0 —
2
— 10
29% got this right
Write 81 as 9^2. Remove the nines. Include powers. x=2. Sub-topic of indices and surds and standard form.
3
If you have a question, for example (6^(x+2)/2) = 108. You have to first do cross multiplication. 6^(x+2)=216. Write 216 as a power of 6. 6^(x+2)= 6^(3). Remove the sixes. x+2=3. x = 3-2. x = 1. Therefore, One(1) is the answer.Other way, view image.
4
Whats 3^(3)?
27
79% got this right
3^(2) x 3. 9x3 = 27.
5
8x5x10x2x8
6400
88% got this right
40x10x16
400x16
800x8
6400
6
60x40
1159 —
3200
— 10000
77% got this right
60x40
6x4=32
32 include 2 0s from 6 and 4. = 3200
7
sin^(2)5+cos^(2)5
1
61% got this right
Identity sin^(2)d+cos^(2)d=1
