exam Maths Puzzle Numerical Ability

what is the prime numbers of 68

what is the prime numbers of 112

what is the prime numbers of 235

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exam Other Question

beth must complete 125 credit hours of instruction. If 20% of beth's credit hours remain to be completed, how many credits does she still need to take?
I tried 125/ .20
Doc O had 10,000 invested at 5%. How much would he have to invest at 8% so that his total interest per year would equal 7% of the two investments?