x a x b
x 3 x 4
Area = 12_2
Area 6 cm2
13 × 2 = 26
26 × 3 = 78
78 × 4 = 312
312 × 5 = 1560
7 + 5 = 12
12 + 7 = 19
19 + 9 = 28
28 + 11 = 39
Solution:
Sunday`s tomorrow = Monday
Day after Sunday`s tomorrow = Tuesday
Yesterday is five days before = Thursday
Today = Friday, so tomorrow = Saturday
3 × 2 + 1 = 7
7 × 2 + 2 = 16
16 × 2 + 3 = 35
35 × 2 + 4 = 74
74 × 2 + 5 = 153
3 × 2 = 6
6 × 3 = 18
18 × 2 = 36
36 × 3 = 108
108 × 2 = 216
216 × 3 = 648
648 × 2 = 1296
If each group comprises of 2 handshakes than total handshakes of all the individuals are 120*2 handshakes = 240
taking Lcm 240 = 16*15 hence 16 persons in total