Advertisements
Advertisements
प्रश्न
Find the product, using suitable properties:
7 × (50 − 2)
उत्तर
7 × (50 − 2)
= (7 × 50) − (7 × 2) a × (b − c) = (a × b) − (a × c)
= 350 − 14
= 336
APPEARS IN
संबंधित प्रश्न
Find the product, using suitable properties:
8 × 53 × (−125)
In a class test containing 10 questions, 5 marks are awarded for every correct answer and (− 2) marks are awarded for every incorrect answer and 0 for questions not attempted.
Mohan gets four correct and six incorrect answers. What is his score?
A cement company earns a profit of Rs 8 per bag of white cement sold and a loss of Rs 5 per bag of grey cement sold
1) The company sells 3, 000 bags of white cement and 5,000 bags of grey cement in a month. What is its profit or loss?
2) What is the number of white cement bags it must sell to have neither profit nor loss, if the number of grey bags sold is 6,400 bags.
Find the following product: (– 25) × 37 × 4
Find the following products: (– 20) × (– 2) × (– 5) × 7
Find the following products: (– 1) × (– 5) × (– 4) × (– 6)
If * is an operation have, such that for integers a and b. We have a * b = a × b + (a × a + b × b), then find (–6) * 2
If Δ is an operation such that for integers a and b we have a Δ b = a × b – 2 × a × b + b × b (–a) × b + b × b then find 4 Δ (–3) Also show that 4 ∆ (–3) ≠ (–3) ∆ 4.
In a test, +3 marks are given for every correct answer and –1 mark are given for every incorrect answer. Sona attempted all the questions and scored +20 marks though she got 10 correct answers.
- How many incorrect answers has she attempted?
- How many questions were given in the test?
A multistorey building has 25 floors above the ground level each of height 5 m. It also has 3 floors in the basement each of height 5 m. A lift in building moves at a rate of 1 m/s. If a man starts from 5 0m above the ground, how long will it take him to reach at 2nd floor of basement?
