Miscellaneous Quant

Front 1

is 0 a positive number?

Back 1

0 is neither positive nor negative. But It is even number.

Front 2

Forty percent of the rats included in an experiment were male rats. If some of the rats died during the experiment and 30 percent of the rats that died were male rats, what was the ratio of the death rate among the male rats to the death rate among the female rats?

for such questions
use tree diagram of 100 percent

Back 2

One-fifth of the light switches produced by a cer­tain factory are defective. Four-fifths of the defective switches are rejected and one twentith of the nondefective switches are rejected by mistake. If all the switches not rejected are sold, what percent of the switches sold by the factory are defective?

for such questions use tree diagram

Front 3

Any number when divisible by 4 will have remainder 0,1,2 or 3.

So correspondingly decimals will be 0,0.25,0.5,0.75

Similarly for 5, remainders are 0,1,2,3,4

and corresponding decimals are

0.2,0.4,0.6,0.8

Back 3

any number not multiple of 3, when divided by 3 will give repeating decimal.