ANSWER : 20:15:12

Explanation : : Let 6A=8B=6C=K =>A = k/6;B=k/8;c=k/10 =>A:B:C=k/6:k/8:k/10 required ratio=20:15:12

ANSWER : 168

Explanation : : Ratio of values =5 : 6/2 : 8/4 => ratio =20:12:8 ∴value of 25 ps.coins =Rs.(210 x 8/40) =Rs.42 ∴No of 25 ps coins =42 x 4 = 168

ANSWER : 8

Explanation : : A polygon is called a regular polygon when all of its sides are of the same length and all of its angles are of the same measure. Each exterior angle of a polygon of side 'n'=360°/n ∴By given data, 360°/n - 360°/n+1 =5 =>360°n+360-360°n / n(n+1)=5 =>n²+n-72=0 =>n²+9n-8n-72=0 =>n(n+9)-8(n+9)=0 =>(n-8)(n+9)=0 =>n=8 ∴No of sides =n=8

ANSWER : 9944

Explanation : : Largest 4 digits =9999 113 88√9999 88 -------- 119 88 -------- 319 264 -------- 55 --------- ∴ required number =(9999-55)=9944

ANSWER : 8.66

Explanation : Findout the wrong number in the sequence: 190,166,145,128,112,100,91 opt1:100 opt2:166 opt3:128 opt4:112 ans: 128 Exp: Given sequence 190,166,145,128,112,100,91 190-24=166 166-21=145 145-18=127 127-15=112 112-12=100 100-9 =91 and so on ∴wrong number is 128.