self Maths Puzzle

18,30,49,78,__, __

Read Solution (Total 2)

self Other Question

Five persons having ages in ascending order with exact difference of 5 years, decided to donate for a charity ,an amount equal to fifty times of their ages. The total donation was Rs 8750.Find the ages of five persons ? use any mathematical signs and prove
4-4-4-4=20
'-' indicates blank place. only one sign at one place