Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 525 · 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.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) not enough info (b) 50 (c) 10 (d) 5
2. 2.🧩 Kabir is 12 years old. Saanvi is 5 years older than Kabir. How old is Saanvi? (a) not enough info (b) 18 (c) 17 (d) 5
3. 3.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
4. 4.🧩 A box has 6 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 35 (b) not enough info (c) 30 (d) 11
5. 5.🧩 Meera bought 5 kites and a bag for ₹70 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹70 (c) ₹14 (d) ₹65
6. 6.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) not enough info (b) 70 (c) 14 (d) 7
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
10. 10.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
11. 11.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
12. 12.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
13. 13.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
14. 14.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
16. 16.🧩 Rohan bought 3 mangoes for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) ₹55 (c) not enough info (d) ₹150
17. 17.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 9 PM (c) 5 PM (d) not enough info
18. 18.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
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.🧩 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
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
24. 24.🧩 Meera is 10 years old. Aarav is older than Meera. How old is Aarav? (a) 12 (b) 11 (c) not enough info (d) 15
25. 25.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
27. 27.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
29. 29.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 3 PM (d) 4 PM
30. 30.🧩 Arjun bought 5 notebooks and a water bottle for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) ₹33 (b) not enough info (c) ₹165 (d) ₹160
31. 31.🧩 Nisha bought 5 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹10 (c) not enough info (d) ₹15
32. 32.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
33. 33.🧩 Ishaan is 10 years old. Arjun is 7 years older than Ishaan. How old is Arjun? (a) not enough info (b) 18 (c) 7 (d) 17
34. 34.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) not enough info (c) 7 PM (d) 8 PM
35. 35.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
36. 36.🧩 Ananya bought 2 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹45 (c) ₹90 (d) ₹50
37. 37.🧩 Rohan is 6 years old. Tara is 8 years older than Rohan. How old is Tara? (a) 8 (b) not enough info (c) 15 (d) 14
38. 38.🧩 A box has 3 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 20 (c) 8 (d) 15
39. 39.🧩 A box has 7 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 63 (b) not enough info (c) 72 (d) 16
40. 40.🧩 Rohan is 11 years old. Ishaan is 9 years older than Rohan. How old is Ishaan? (a) not enough info (b) 9 (c) 20 (d) 21

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