RIDDLE
A boy has as many sisters as brothers…
…But each sister has only half as many sisters as brothers… How many brothers and sisters are there in the family?
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Answer:
The answer is 3 girls and 4 boys
Explanation:
Let B = number of boys and G = number of girls
For each boy, the number of brothers is B - 1 (number of boys excluding himself) and the number of sisters is G. It’s given that B - 1 = G (1)
For each girl, the number of sisters is G - 1 (number of girls excluding herself) and the number of brothers is B. It’s given that G - 1 = 0.5 · B (2)
So, by solving the simultaneous equations (1) and (2), we can get the number of children.
Rearranging (1), B = G + 1 (3)
Substituting (3) into (2), G - 1 = 0.5 · (G + 1) (4)
Solving (4) for G as follows:
2G - 2 = G + 1
G = 3
Substituting G = 3 into (3), we get B = 3 + 1 = 4
Have a great day ahead
Therefore, the answer is 3 girls and 4 boys
Answer:
Study the below table and answer the following questions. CITIES KOLKATA MUMBAI Oy DELHI ite farHENNAI 2 Temperature/ RainfalI by 3. TempC Rainfall cms Temp °C Rainfall cms Temp °C Rainfall cms Temp °C Rainfall cms Jan 20 1.2 24 0.2 14 2.5 25 4.6 Feb 22 2.8 24 0.2 17 1.5 26 1.3 Mar April May 27.1 3.4 26.7 23.3 1.3 27.7 1.3 30 5.1 28 30 1 30 1.8 30 13 30 1.8 33 1.8 33 3.8 June July 30 29 51 33 74 33 4.5 28.7 29 33 27 61 30 19 1. In which month Delhi experiences the lowest temperature? Aug Sept 8.7 33.4 27.2 36.9 29.4 17.8 29 What is the annual range of temperature of (a) Delhi (b) Mumbai 25 27 27 30.2 31 11.3 29 30 Oct 28 13 28 4.8 26 1.3 28 12 31 Nov Dec 23.4 19.7 Calculate the (a) mean annual temperature (b) mean annual rainfall of al cities. 2.7 27.2 1 0.2 19.4 15.6 25.9 0.4 35 25 1 24.7 13.9 4. What differences do you observe in the rainfall distribution between Kolkata and Chennai?Study the below table and answer the following questions. CITIES KOLKATA MUMBAI Oy DELHI ite farHENNAI 2 Temperature/ RainfalI by 3. TempC Rainfall cms Temp °C Rainfall cms Temp °C Rainfall cms Temp °C Rainfall cms Jan 20 1.2 24 0.2 14 2.5 25 4.6 Feb 22 2.8 24 0.2 17 1.5 26 1.3 Mar April May 27.1 3.4 26.7 23.3 1.3 27.7 1.3 30 5.1 28 30 1 30 1.8 30 13 30 1.8 33 1.8 33 3.8 June July 30 29 51 33 74 33 4.5 28.7 29 33 27 61 30 19 1. In which month Delhi experiences the lowest temperature? Aug Sept 8.7 33.4 27.2 36.9 29.4 17.8 29 What is the annual range of temperature of (a) Delhi (b) Mumbai 25 27 27 30.2 31 11.3 29 30 Oct 28 13 28 4.8 26 1.3 28 12 31 Nov Dec 23.4 19.7 Calculate the (a) mean annual temperature (b) mean annual rainfall of al cities. 2.7 27.2 1 0.2 19.4 15.6 25.9 0.4 35 25 1 24.7 13.9 4. What differences do you observe in the rainfall distribution between Kolkata and Chennai?
Explanation:
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