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Mental math test.

3.6
(65 votes)
7 questions
English
You can't use a calculator. Test your mental math with our questions. Improve you mental math.
1

60x60

3600

Easy  87% 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

Hard  31% 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

Easy  80% got this right

3^(2) x 3. 9x3 = 27.
5

8x5x10x2x8

6400

Easy  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

64% got this right

Identity sin^(2)d+cos^(2)d=1