Question
Three bells ring at intervals of 28 seconds, 60 seconds,
and 84 seconds, respectively. How many times will all three bells ring together in a span of 10 minutes?Solution
Time taken by all 3 bells to ring together = L.C.M of 28, 60 and 84 = 420 seconds 10 minutes = 10 X 60 = 600 seconds 600 ÷ 420 ~ 1.42 So, the three bells will ring together only once in the given interval of 10 minutes.
Select the correct combination of mathematical signs that can sequentially replace the “@” sign and balance the following equation.
16@5@4@2@...
Which among the given operators should replace the “%” (in the same order) in the given expression below:
9 % 14 % 9 % 90 % 42 % 15
- If ‘+’ means ‘-’, ‘×’ means ‘+’, ‘-’ means ‘÷’ and ‘÷’ means ‘×’, then what is the value of the following expression? <...
If $ means +, # means - , @ means x and * means ÷, then what is the value of 22 $ 3 @ 10 # 21 * 7 =?
If '@' denotes 'addition', '#' denotes 'subtraction', '$' denotes 'multiplication' and '%' denotes 'division', then what will be the value of the follow...
If A denotes '+', B denotes ' X ', C denotes ' - ' and D denotes '÷', then what will come in place of '?' in the following equation?
117 D 13 B ...
(19 % 3) * 11 = 2 and 9 * 3 % 2 = 5. Then, 8 % 4 * 2 = ?
By interchanging the given two signs and numbers which of the following equation will be correct?
× and +, 6 and 4
- Which two signs should be interchanged to correct the given equation?
5 + 3 × 8 – 12 ÷ 4 = 3 If '+' means 'subtraction', ' X ' means 'addition', '-' means 'division' and '÷' means 'multiplication', then what is the value of the following expres...
