`{:((i), 1000Å,("क"), "माइक्रो तरंगे"),((ii),20000Å,("ख") ,"रेडियो तरंगे"),((iii),10^(7)Å,("ग"),"X-किरणे"),((iv), 2000Å,("घ"),"अवरक्त विकिरण"),((v),10^(11)Å,("ड"),"पराबैंगनी विकिरण"):}`

Solve (x)/(2)+(x)/(3)-(x)/(4)=7(i)x=11(ii)x=12(iii)x=10(iv)x=14

Write number of significant digits (i) 62.3 cm (ii) 6.23 xx 10^(1) cm (iii) 20.00 (iv) 0.02 xx 10^(-19) (v) 500.000 (vi) 0.5210 (vii) 896.80 (viii) 201 (ix) 1200 (x) 1200 N.

Write number of significant digits (i) 62.3 cm (ii) 6.23 xx 10^(1) cm (iii) 20.00 (iv) 0.02 xx 10^(-19) (v) 500.000 (vi) 0.5210 (vii) 896.80 (viii) 201 (ix) 1200 (x) 1200 N.

Which of the two rational numbers is greater in each of the following pairs? (i) 3/-7 or 1/7 , (ii) 11/(-18) or -5/18 , (iii) 7/10 or -9/10 (iv) 0 or -3/4 , (v) 1/12 or 0, (vi) 18/(-19) or 0 (vii) 7/8 or 11/16 , (viii) 11/-12 or -10/11 , (ix) -13/5 or -4 (x) 17/(-6) or -13/4 , (xi) 7/(-9) or -5/8 , (xii) -3/(-8) or 5/9

Convert each of the following Into an improper fraction: (i) 5(5)/(7) (ii) 9(3)/(8) (iii) 6(3)/(10) (iv) 3(5)/(11) (v) 10(9)/(14) (vi) 12(7)/(15) (vii) 8(8)/(13) (viii) 51(2)/(3)

Express the following fractions as decimals: (i) 2/10 (ii) 1359/1000 (iii) 7 1/2 (iv) 9 1/4 (v) 12 1/8