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Maths Puzzle
Numerical Ability
2)
Evaluate. | -7 | + | 13 |
i thought it was
-20 but im wrong
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book Other Question
3w/5 - 1 = w/2 + 1
A ship using sound-sensing devices above and below water recorded a surface explosion 39 seconds sooner on its underwater device than on its above-water device. If sound travels in