Question

find the sum with explanation

Answer 1

Angle b will the same as 30 degrees becuase they are opposite angles. Angle a will be given by 180-30=150. Angle c will be equal to angle a becuase opposite angles are equal.

Answer 2

10th to 99th, any table,
very easy method to learn.
I didn't know this.

How to write Table of any two digit number?

F*or example Table of *87*

First write down *table of 8 then write down table of 7 beside it*

8 7 87
16 14 (16+1) 174
24 21 (24+2) 261
32 28 (32+2) 348
40 35 (40+3) 435
48 42 (48+4) 522
56 49 (56+4) 609
64 56 (64+5) 696
72 63 (72+6) 783
80 70 (80+7) 870

Now table of 38

3 8 38
6 16 (6+1) 76
9 24 (9+2) 114
12 32 (12+3) 152
15 40 (15+4) 190
18 48 (18+4) 228
21 56 (21+5) 266
24 64 (24+6) 304
27 72 (27+7) 342
30 80 (30+8) 380
33 88 (33+8) 418
36 96 (36+9) 456

Now table of 92

9 2 92
18 4 184
27 6 276
36 8 368
45 10 (45+1)460
54 12 (54+1)552
63 14 (63+1)644
72 16 (72+1)736
81 18 (81+1)828
90 20 (90+2)920
99 22 (99+1)1012
108 24 (108+2)1104

This way one can make Tables from 10

This is Vedic Mathematics!!..