In a division sum, the divisor is 5 times the quotient and twice the remainder. If the remainder is 5, what is the number ?

Given remainder = 5. Divisor = 2 × remainder = 2 × 5 = 10. Also divisor = 5 × quotient, so quotient = 10/5 = 2. Dividend = divisor × quotient + remainder = 10 × 2 + 5 = 25. However, the official key marks (1) 52 — likely a misprint of 25. Based on correct mathematics the dividend is 25, matching option (3).