What sum will amount to Rupees `4590` at `12%` per annum simple interest in 3 years​

What sum will amount to ₹5525 at 10% per annum simple interest in 3 years?

What sum will amount to ₹6600 in 2 year at 10% per annum simple interest?

What sum will amount to Rs. 6,600 in 4 years at 8% per annum simple interest?

What time will it take for a sum to amount to three times itself at 12% per annum under simple interest ?

In how many years will a certain sum amounts to 6 times itself at 25% per annum simple interest ?

A sum of money amounts to Rs. 1500 in 5 years at 10% per annum at simple interest. Find the sum.