Number Puzzles - General Questions

A mother is 4 times as old as her son, who is 10. How old will the mother be in 12 years?

Which number replaces the question mark? 16 25 ? 49

If 7 ★ 4 means 7 × 4 + 7, what is 4 ★ 15?

The sum of three consecutive numbers is 114. What is the largest of them?

The sum of three consecutive numbers is 48. What is the largest of them?