Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 863 · 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.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
2. 2.🧩 Aarav is 7 years old. Saanvi is 8 years older than Aarav. How old is Saanvi? (a) 16 (b) 15 (c) not enough info (d) 8
3. 3.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 70 (b) 14 (c) not enough info (d) 7
4. 4.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
7. 7.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
8. 8.🧩 A box has 8 rows of apples, with 5 in each row. How many apples are in the box? (a) 13 (b) not enough info (c) 40 (d) 45
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Diya is 6 years old. Arjun is 5 years older than Diya. How old is Arjun? (a) 11 (b) 5 (c) not enough info (d) 12
11. 11.🧩 Arjun bought 6 notebooks and a cap for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹13 (b) not enough info (c) ₹74 (d) ₹80
12. 12.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) yes, it is certain (c) no mango is sweet (d) no, check more
13. 13.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you
15. 15.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Vihaan bought 3 pens for ₹135 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹135 (c) ₹50 (d) ₹45
17. 17.🧩 A box has 8 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 40 (b) not enough info (c) 45 (d) 13
18. 18.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 4 PM (d) not enough info
19. 19.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
20. 20.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
21. 21.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Kabir is 11 years old. Rohan is older than Kabir. How old is Rohan? (a) 16 (b) 12 (c) 13 (d) not enough info
23. 23.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 40 (b) not enough info (c) 8 (d) 4
24. 24.🧩 Vihaan bought 3 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) ₹55 (c) not enough info (d) ₹150
25. 25.🧩 A box has 4 rows of apples, with 9 in each row. How many apples are in the box? (a) 45 (b) not enough info (c) 13 (d) 36
26. 26.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
27. 27.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
28. 28.🧩 Ishaan bought 6 mangoes and a bag for ₹230 in all. Each mango cost the same. What did one mango cost? (a) ₹38 (b) ₹230 (c) not enough info (d) ₹224
29. 29.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 5 PM
30. 30.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
31. 31.🧩 Kabir bought 5 pens and a lunch box for ₹315 in all. Each pen cost the same. What did one pen cost? (a) ₹63 (b) ₹310 (c) not enough info (d) ₹315
32. 32.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 12 (b) 36 (c) 32 (d) not enough info
33. 33.🧩 Nisha is 8 years old. Meera is older than Nisha. How old is Meera? (a) 9 (b) 13 (c) not enough info (d) 10
34. 34.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
35. 35.🧩 Ananya bought 4 pens and a water bottle for ₹230 in all. Each pen cost the same. What did one pen cost? (a) ₹57 (b) not enough info (c) ₹226 (d) ₹230
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
37. 37.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
38. 38.🧩 Ishaan bought 6 kites for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹150 (b) ₹25 (c) not enough info (d) ₹30
39. 39.🧩 Diya is 11 years old. Meera is 7 years older than Diya. How old is Meera? (a) not enough info (b) 19 (c) 18 (d) 7
40. 40.🧩 Kabir bought 4 mangoes and a bag for ₹130 in all. Each mango cost the same. What did one mango cost? (a) ₹130 (b) ₹32 (c) ₹126 (d) not enough info

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