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when shilpa made a necklace of either 15 beads,25 beads or 30 beads,not a single bead was left over.what could be the least no of beads shilpa had?

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Answer 150
Reason is the HCF of 15, 25, 30 = 150 (5*5*3*2)
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just take LCM of 15, 25 and 30. The answer is 150 beads.
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least no of beads means LCM OF 15,25&30=150
so that not a single bead was left.
ANS=150.
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Bank Exam Other Question

A and B started a business with an investment which is in the ratio of 5:2 respectively. After 6 months from the start of the business, c joined with an investment which was twice A's investment and after 10 months from the start of the business B withdrew all of the amount that he invested. If the total annualprofit was Rs. 6510, What was the difference between A's share in the annual profit and B's share in annual profit? Ram invested a certain sum in scheme A, which offers simple interest at the rate of 12% p.a. for 3 years. He also invested Rs. 6,000 in scheme B, which offers compound interest (compounded annually) at the rate of 10% p.a. for 2 years. If the interest earned from scheme A is 2/7th of the interest from scheme B, what is the sum invested in scheme A?