Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 28 · 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.🧩 Aarav bought 4 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹120 (b) ₹30 (c) not enough info (d) ₹35
2. 2.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
4. 4.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
5. 5.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
6. 6.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 70 (b) 14 (c) 7 (d) not enough info
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
8. 8.🧩 Arjun bought 5 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹75 (c) not enough info (d) ₹15
9. 9.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
10. 10.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
11. 11.🧩 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
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Tara is 7 years old. Nisha is 2 years older than Tara. How old is Nisha? (a) not enough info (b) 10 (c) 9 (d) 2
14. 14.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
15. 15.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
16. 16.🧩 Rohan bought 3 pens and a lunch box for ₹190 in all. Each pen cost the same. What did one pen cost? (a) ₹63 (b) not enough info (c) ₹187 (d) ₹190
17. 17.🧩 Tara bought 2 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹45 (c) not enough info (d) ₹90
18. 18.🧩 Aarav bought 5 pens and a lunch box for ₹340 in all. Each pen cost the same. What did one pen cost? (a) ₹340 (b) ₹335 (c) not enough info (d) ₹68
19. 19.🧩 Nisha is 12 years old. Rohan is 8 years older than Nisha. How old is Rohan? (a) 20 (b) 21 (c) 8 (d) not enough info
20. 20.🧩 Nisha bought 5 notebooks and a lunch box for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹205 (b) ₹42 (c) not enough info (d) ₹210
21. 21.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
22. 22.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 2 PM
23. 23.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
24. 24.🧩 Diya is 10 years old. Tara is older than Diya. How old is Tara? (a) 11 (b) 15 (c) 12 (d) not enough info
25. 25.🧩 A box has 8 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 45 (c) 40 (d) 13
26. 26.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) 2 PM (d) not enough info
27. 27.🧩 Nisha bought 3 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹65 (c) ₹180 (d) not enough info
28. 28.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) your handwriting (d) the colour of ink
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
30. 30.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Aarav bought 5 pens for ₹250 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) not enough info (c) ₹50 (d) ₹250
33. 33.🧩 Kabir is 12 years old. Arjun is 8 years older than Kabir. How old is Arjun? (a) 8 (b) 21 (c) not enough info (d) 20
34. 34.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
35. 35.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) not enough info (b) 60 (c) 6 (d) 12
36. 36.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) 18 (c) not enough info (d) 9
37. 37.🧩 Saanvi is 7 years old. Nisha is 8 years older than Saanvi. How old is Nisha? (a) 15 (b) 16 (c) not enough info (d) 8
38. 38.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 8 (b) 80 (c) not enough info (d) 16
39. 39.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
40. 40.🥭 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, it is certain (c) yes, mangoes match (d) no, check more

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