There are 15 dozen candles in a box. If there are 39 such boxes. How many candles are there in all the boxes together?

 For bigger boxes :  t = 25 cm, b = 20 cm, h = 5 cm  Total surface area of 1 bigger box = 2(lb + bh + hl)  = 2(25 × 20...

The answer of this riddle is 7. Explanation :- There are 7 candles lit and if I blew out 2 of them , I still have 7 Candles 5 lit and 2...

(c) : x1 + x2 + x3 + x4 = 10 The number of positive integral solution is 6 + 4 – 1C4 – 1 = 9C3 It is the same as the...

(a) Required number of bananas = 21/7 x 54 =162 dozen

 (c) Number of mangoes = 12 dozens = 12 × 12 = 144  Number of mangoes in 43 boxes = 43 × 144 = 6192

(b) Requirement of bananas for 1 day in the canteen = 13 dozens  Requirement of bananas for 9 weeks i.e. 63 days = 63 × 13 dozens = 63 × 13...

(b) Treat B and T as a single letter. Then the remaining letters (5 + 1 = 6) can be arranged in 6! ways. Since, O is repeated twice, we...

(d) Assume the 2 given students to be together (i.e one]. Now there are five students. Possible ways of arranging them are = 5! = 120 Now, they (two girls) can arrange themselves...

(b) Take, A and B to be always together as a single entity. Now, total no. of children = 4 – 2 + 1 = 3 These can be arranged...