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Find the following product: (– 25) × 37 × 4
Concept: undefined >> undefined
Find the following products: (– 18) × (– 10) × 9
Concept: undefined >> undefined
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Find the following products: (– 20) × (– 2) × (– 5) × 7
Concept: undefined >> undefined
Find the following products: (– 1) × (– 5) × (– 4) × (– 6)
Concept: undefined >> undefined
If * is an operation such that for integers a and b we have a * b = a × b + (a × a + b × b) then find (–3) * (–5)
Concept: undefined >> undefined
If * is an operation such that for integers a and b we have a * b = a × b + (a × a + b × b) then find (–6) * 2
Concept: undefined >> undefined
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.
Concept: undefined >> undefined
The given table shows the freezing points in °F of different gases at sea level. Convert each of these into °C to the nearest integral value using the relation and complete the table,
`C = 5/9 (F - 32)`
| Gas | Freezing Point at Sea Level (°F) |
Freezing Point at Sea Level (°C) |
| Hydrogen | –435 | |
| Krypton | –251 | |
| Oxygen | –369 | |
| Helium | –458 | |
| Argon | –309 |
Concept: undefined >> undefined
A green grocer had a profit of ₹ 47 on Monday, a loss of ₹ 12 on Tuesday and loss of ₹ 8 on Wednesday. Find his net profit or loss in 3 days.
Concept: undefined >> undefined
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?
Concept: undefined >> undefined
In a true-false test containing 50 questions, a student is to be awarded 2 marks for every correct answer and –2 for every incorrect answer and 0 for not supplying any answer. If Yash secured 94 marks in a test, what are the possibilities of his marking correct or wrong answer?
Concept: undefined >> undefined
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 50 m above the ground, how long will it take him to reach at 2nd floor of basement?
Concept: undefined >> undefined
25.4 × 1000 = ______.
Concept: undefined >> undefined
93.5 × 100 = ______.
Concept: undefined >> undefined
