In 54, the second digit is 4, and the first digit is 5. Therefore, 4²+5 =16+5 =21 Similarly, 1²+2 =1+2 =3 Similarly, 3²+0 =9+0 =9 Similarly, 9²+0 =81+0 =81 Similarly, 1²+8 =1+8 =9 Thus, you will get the answer as 9.
first num is -54. adding the digits gives 9 whch is the 4th num. 2nd num is 21, adding the digits gives 3 whch is the 3rd num. now, following the same order frm the left side(-54,21,3, 9,81,12) as shown the gap, adding the first num i.e. 21 (frm left syd) gives 3 whch is the 4th num(frm left syd). adding the 2nd num(frm lft syd) i.e. 81 gives 9 whch is the 3rd num(frm left syd)
Find the number that comes next in the following series:
3, 7, 12, 14, 16, 19, 21, 25, 30, 41, 45, 52, 54, 56, 59, 61, 65, 70, ?