One litre of water at 30°C is mixed with one litre of water at 50°C. The
temperature of the mixture will be
(a) 80°C (b) more than 50°C but less than 80°C
(c) 20°C (d) between 30°C and 50°C
A sum is taken for two years at 16% p.a. If interest is compounded
after every three months, the number of times for which interest is
charged in 2 years is
(a) 8 (b) 4 (c) 6 (d) 9
In places of hot climate it is advised that the outer walls of houses be
painted white. Explain.
A jacket was sold for Rs 1,120 after allowing a discount of 20%. The
marked price of the jacket is
(a) Rs 1440 (b) Rs 1400 (c) Rs 960 (d) Rs 866.66
Latika bought a teapot for Rs 120 and a set of cups for Rs 400. She
sold teapot at a profit of 5% and cups at a loss of 5%. The amount
received by her is
(a) Rs 494 (b) Rs 546 (c) Rs 506 (d) Rs 534
A bought a tape recorder for Rs 8,000 and sold it to B. B in turn sold
it to C, each earning a profit of 20%. Which of the following is true:
(a) A and B earn the same profit.
(b) A earns more profit than B.
(c) A earns less profit than B.
(d) Cannot be decided
Discuss why wearing more layers of clothing during winter keeps us
warmer than wearing just one thick piece of clothing .
The marked price of an article is Rs 80 and it is sold at Rs 76, then
the discount rate is
(a) 5% (b) 95% (c) 10% (d) appx. 11%
Match the following :
(i) Land breeze blows during (a) summer
(ii) Sea breeze blows during (b) winter
(iii) Dark coloured clothes are preferred during (c) day
(iv) Light coloured clothes are preferred during (d) night
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