Question
Match the following:
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- Goldstein (Proton): Goldstein discovered the proton through his work with cathode ray tubes and canal rays.
- Chadwick (Neutron): Chadwick discovered the neutron in 1932, completing the understanding of atomic structure.
- J.J. Thomson (Electron): Thomson is credited with the discovery of the electron in 1897 during his cathode ray tube experiments.
- John Dalton (Atomic theory): Dalton formulated the atomic theory in the early 19th century, laying the foundation for modern chemistry.
- A value is increased by 10% and then further increased by 15%. Determine the overall percentage increase.
An original figure is first enhanced by 25% and then reduced by 10%. What is the final overall percentage change?
In a school, 30% of the students are not participating in any competition. 80% of the students who are participating in the competition are girls. If 42...
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A gave 40% of amount to B. B gave 20% of amount received from A to C. If amount received by C from B is Rs.184, then find the amount received by B from A.
From Rs. 16,500, a boy gave 15% to a library fund, 10% of the remaining amount to a sports club, and 20% of the next remaining to his college fund. What...
A seller calculated his intended selling price at 6% profit on the cost of a product. However, owing to some mistake while selling, the units and tens d...
Income of A is twice the income of B. B and A spend 65% and 75% respectively of their incomes. Find the savings of A, if B saves Rs. 7000 in a month.
A spent 30% and 26% of his monthly salary on food and rent, respectively. Of the remaining amount, he gave 20% and 40% to his mother and brother, respec...
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