ATQ, According to Nora, her age can be 19, 20, 21, or 22 years. According to her grandmother, her age can be 20, 21, 22, 23, or 24 years. According to her aunt, her age can be 20 or 21 years. Finding the common ages from all ranges: Common ages: 20, 21 Required average: (20+21)/2 = 20.5 yrs
32 33 29 38 ? 47 11
...45, 59, 31, ?, 17, 87
What will come in place of the question mark (?) in the following series?
15, 16, 25, 50, 99, 180, ?
4, 6, 12, 30, ?, 315, 1260
21, 37, 73, 137, ?, 381
10 15 40 135 ? 2825 16980
...7, 7, 21, 105, 735, ?
120, 122, 128, ?, 272, 992
1290, 1225, 1175, ?, 1112, 1095, 1085
324 972 486 1458 729 ?
...
