express the following in exponential form
1] `6*6*6*6`
2] `t*t`
3] `b*b*b*b`
4] `5*5*7*7*7`
5] `2*2*a*a`
6] `a*a*a*c*c*c*c*d`

Write in exponential form . a. 3^(4)xx3^(5) b. (-7)^(4)xx(-7)^(6)

Add the following algebraic expressions : 2a - 3b + 4c , -3a + 2b - 5c , 7a - c and 3b + 6c

Find the sum of the following algebraic expressions : 3a - 4b + 5c , 2a + 3b - 6c , - 5a + 8b + 7c

Express the following as improper fractions : (a) (7) 3/4 (b) (5) 6/7 (c) (2) 5/6 (d) (10) 3/5 (e) (9) 3/7 (f) (8) 9/4

Which of the following sets are disjoint ? A = {2,3},B={4,5,6} C = {3,5,8},D={1,5,7} .

Which of the following fractions is the greatest of all? 7/8,6/7,4/5,5/6 (a) 6/7 (b) 4/5 (c) 5/6 (d) 7/8

Compare the fractions and put an appropriate sign. (a) 3/6 , 5/6 (b) 1/7 , 1/4 (c) 4/5 , 5/5 (d) 3/5 , 3/7

Express the product as a monomial (-4/7a^2b)xx(-2/3b^2c)xx\ (-7/6c^2a)

Given the sets A = {1, 3, 5} , B = {2,4, 6} and C = {0, 2,4, 6, 8} , which of the following may be considered as universal set (s) for all the three sets A, B and C (i) {0, 1, 2, 3, 4, 5, 6} (ii) phi (iii) {0,1,2,3,4,5,6,7,8,9,10} (iv) {1,2,3,4,5,6,7,8}

The pH of rain water, is approximately : a) 5.6 b) 7.5 c) 7.0 d) 6.5