Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 791 · 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 laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
2. 2.🧩 Vihaan bought 3 balls and a bag for ₹175 in all. Each ball cost the same. What did one ball cost? (a) ₹172 (b) ₹175 (c) not enough info (d) ₹58
3. 3.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 5 PM
4. 4.🧩 Saanvi is 8 years old. Ananya is 9 years older than Saanvi. How old is Ananya? (a) 9 (b) 17 (c) not enough info (d) 18
5. 5.🧩 Ananya bought 3 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹55 (c) not enough info (d) ₹150
6. 6.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
7. 7.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 6 PM (d) not enough info
8. 8.🧩 Arjun is 12 years old. Ananya is 8 years older than Arjun. How old is Ananya? (a) not enough info (b) 8 (c) 20 (d) 21
9. 9.🧩 A box has 6 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 24 (b) not enough info (c) 10 (d) 28
10. 10.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
11. 11.🧩 Kabir is 10 years old. Nisha is older than Kabir. How old is Nisha? (a) 12 (b) 11 (c) 15 (d) not enough info
12. 12.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
13. 13.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
14. 14.🧩 Rohan is 12 years old. Meera is older than Rohan. How old is Meera? (a) 17 (b) 13 (c) not enough info (d) 14
15. 15.🧩 Ishaan bought 2 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹35 (d) ₹30
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
17. 17.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
18. 18.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 24 (c) 20 (d) 9
19. 19.🧩 A box has 7 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 16 (b) 72 (c) not enough info (d) 63
20. 20.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
22. 22.🧩 Aarav is 6 years old. Arjun is older than Aarav. How old is Arjun? (a) 8 (b) not enough info (c) 7 (d) 11
23. 23.🧩 Saanvi bought 4 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹15 (d) ₹20
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
25. 25.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
28. 28.🧩 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
29. 29.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
30. 30.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 9 PM
31. 31.🧩 Aarav is 8 years old. Arjun is older than Aarav. How old is Arjun? (a) 10 (b) 13 (c) 9 (d) not enough info
32. 32.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
33. 33.🧩 Aarav bought 2 notebooks and a lunch box for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹158 (c) ₹160 (d) ₹80
34. 34.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
35. 35.🧩 Kabir is 7 years old. Rohan is 4 years older than Kabir. How old is Rohan? (a) not enough info (b) 11 (c) 4 (d) 12
36. 36.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
37. 37.🥭 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) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
38. 38.🧩 A box has 4 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 12 (b) 40 (c) 32 (d) not enough info
39. 39.🧩 A box has 7 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 56 (b) not enough info (c) 64 (d) 15
40. 40.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) 10 (c) not enough info (d) 50

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