Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 647 · 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.🧩 Ananya is 10 years old. Vihaan is older than Ananya. How old is Vihaan? (a) 11 (b) not enough info (c) 12 (d) 15
2. 2.🧩 Arjun bought 2 markers and a bag for ₹130 in all. Each marker cost the same. What did one marker cost? (a) ₹130 (b) not enough info (c) ₹128 (d) ₹65
3. 3.🧩 Rohan is 12 years old. Tara is 4 years older than Rohan. How old is Tara? (a) 16 (b) not enough info (c) 17 (d) 4
4. 4.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Vihaan bought 4 mangoes and a bag for ₹180 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹180 (c) ₹45 (d) ₹176
6. 6.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more
7. 7.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 6 PM
8. 8.🧩 Ishaan bought 2 pens for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹110 (b) ₹60 (c) ₹55 (d) not enough info
9. 9.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
10. 10.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 2 PM
11. 11.🧩 Aarav is 8 years old. Vihaan is 5 years older than Aarav. How old is Vihaan? (a) 14 (b) not enough info (c) 13 (d) 5
12. 12.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) 5 PM (d) not enough info
13. 13.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
14. 14.🧩 Rohan is 10 years old. Diya is 8 years older than Rohan. How old is Diya? (a) 8 (b) 19 (c) 18 (d) not enough info
15. 15.🧩 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
16. 16.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 18 (b) 9 (c) not enough info (d) 90
17. 17.🧩 Nisha bought 4 notebooks and a bag for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹90 (b) not enough info (c) ₹22 (d) ₹86
18. 18.🧩 Vihaan bought 6 mangoes for ₹210 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹35 (c) ₹210 (d) not enough info
19. 19.🧩 Aarav is 7 years old. Arjun is 3 years older than Aarav. How old is Arjun? (a) 3 (b) not enough info (c) 11 (d) 10
20. 20.🧩 Ishaan is 6 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) 7 (b) not enough info (c) 8 (d) 11
21. 21.🧩 Aarav bought 5 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) ₹100 (c) ₹20 (d) not enough info
22. 22.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 16 (c) 8 (d) 80
23. 23.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
24. 24.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
25. 25.🧩 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
26. 26.🧩 Arjun bought 5 markers and a water bottle for ₹350 in all. Each marker cost the same. What did one marker cost? (a) ₹350 (b) ₹70 (c) ₹345 (d) not enough info
27. 27.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
28. 28.🧩 Tara bought 5 notebooks and a lunch box for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹180 (c) ₹36 (d) ₹175
29. 29.🐕 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
30. 30.🧩 Vihaan bought 5 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹60 (c) ₹65 (d) ₹300
31. 31.🧩 A box has 4 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 25 (b) not enough info (c) 9 (d) 20
32. 32.🧩 Ananya bought 6 balls for ₹330 in all. Each ball cost the same. What did one ball cost? (a) ₹330 (b) ₹60 (c) ₹55 (d) not enough info
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
34. 34.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 8 PM (d) 7 PM
35. 35.🧩 Vihaan is 6 years old. Aarav is older than Vihaan. How old is Aarav? (a) not enough info (b) 11 (c) 7 (d) 8
36. 36.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
37. 37.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 5 PM
38. 38.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
39. 39.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
40. 40.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence

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