Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 784 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
4. 4.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 6 PM (d) not enough info
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
6. 6.🧩 Aarav bought 6 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹55 (c) ₹300 (d) not enough info
7. 7.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) your handwriting (d) the colour of ink
8. 8.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
9. 9.🧩 A box has 4 rows of apples, with 8 in each row. How many apples are in the box? (a) 32 (b) not enough info (c) 40 (d) 12
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Diya is 12 years old. Ananya is 6 years older than Diya. How old is Ananya? (a) 18 (b) 6 (c) 19 (d) not enough info
12. 12.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
13. 13.🧩 Aarav bought 4 mangoes and a water bottle for ₹110 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹27 (c) ₹106 (d) ₹110
14. 14.🧩 Meera is 12 years old. Vihaan is 2 years older than Meera. How old is Vihaan? (a) 14 (b) 2 (c) 15 (d) not enough info
15. 15.🧩 Ishaan is 6 years old. Nisha is older than Ishaan. How old is Nisha? (a) 11 (b) 8 (c) 7 (d) not enough info
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
17. 17.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
18. 18.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
19. 19.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
20. 20.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
21. 21.🧩 Aarav is 10 years old. Saanvi is 6 years older than Aarav. How old is Saanvi? (a) 6 (b) not enough info (c) 17 (d) 16
22. 22.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
23. 23.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
24. 24.🧩 Rohan is 7 years old. Aarav is older than Rohan. How old is Aarav? (a) 9 (b) 12 (c) 8 (d) not enough info
25. 25.🧩 A box has 6 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 28 (b) 24 (c) 10 (d) not enough info
26. 26.🧩 A box has 3 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) not enough info (b) 28 (c) 21 (d) 10
27. 27.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
28. 28.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 7 (b) 70 (c) not enough info (d) 14
29. 29.🧩 Nisha bought 5 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹200 (b) ₹40 (c) ₹45 (d) not enough info
30. 30.🧩 Meera bought 6 kites and a cap for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) ₹74 (c) not enough info (d) ₹13
31. 31.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
32. 32.🧩 A box has 5 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 9 (b) not enough info (c) 24 (d) 20
33. 33.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
34. 34.🧩 Ananya is 9 years old. Kabir is 4 years older than Ananya. How old is Kabir? (a) 13 (b) not enough info (c) 4 (d) 14
35. 35.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
36. 36.🧩 Saanvi bought 5 balls and a lunch box for ₹205 in all. Each ball cost the same. What did one ball cost? (a) ₹205 (b) ₹41 (c) ₹200 (d) not enough info
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
38. 38.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
40. 40.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True

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